ARM: atmel: add sama5d4ek board support

The code for this board supports following features:
  - Boot media support: NAND flash/SD card/SPI flash
  - Support LCD display
  - Support ethernet
  - Support USB mass storage

Signed-off-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
diff --git a/arch/arm/cpu/armv7/at91/Makefile b/arch/arm/cpu/armv7/at91/Makefile
index 0a2e48d..f4f35a4 100644
--- a/arch/arm/cpu/armv7/at91/Makefile
+++ b/arch/arm/cpu/armv7/at91/Makefile
@@ -9,6 +9,7 @@
 #
 
 obj-$(CONFIG_SAMA5D3)	+= sama5d3_devices.o
+obj-$(CONFIG_SAMA5D4)	+= sama5d4_devices.o
 obj-y += clock.o
 obj-y += cpu.o
 obj-y += reset.o